AISI 8620

AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as rolled condition with a maximum hardness HB 255max. SAE steel 8620 offers high external strength and good internal strength, making it highly wear resistant. AISI 8620 steel has a higher core strength than grades 8615 and 8617

SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content.

Steel 8620 is suited for applications which require a combination of toughness and wear resistance. This grade is commonly supplied in round bar.

Applications for AISI 8620 steel

AISI 8620 steel material is used extensively by all industry sectors for light to medium stressed components and shafts requiring high surface wear resistance with reasonable core strength and impact properties.

Typical Applications are.

  • Arbors
  • Bearings
  • Bushings
  • Cam Shafts
  • Differential Pinions
  • Guide Pins
  • King Pins
  • Pistons Pins
  • Gears
  • Splined Shafts
  • Ratchets
  • Sleeves and other applications where it is helpful to have a steel that can be readily machined and carburized to controlled case depths

    • USA

    ASTM
    A29

    8620

    German

    DIN
    1654

    1.6523/21NiCrMo2

    Japan

    JIS
    G4103

    SNCM220

    British

    BS
    10084/970

    1.6523/20NiCrMo2-2/805M20

    Grade C Mn P S Si Ni Cr Mo
    8620 0.18 - 0.23 0.7 - 0.9 0.035 0.040 0.15 - 0.35 0.4 - 0.7 0.4 - 0.6 0.15 - 0.25
    1.6523/21NiCrMo2 0.17 - 0.23 0.65 - 0.95 0.035 0.035 ≦ 0.40 0.4 - 0.7 0.4 - 0.7 0.15 - 0.25
    1.6523/20NiCrMo2-2 0.17 - 0.23 0.65 - 0.95 0.025 0.035 ≦ 0.40 0.4 - 0.7 0.35 - 0.70 0.15 - 0.25
    SNCM220 0.17 - 0.23 0.6 - 0.9 0.030 0.030 0.15 - 0.35 0.4 - 0.7 0.4 - 0.65 0.15 - 0.3
    805M20 0.17 - 0.23 0.6 - 0.95 0.040 0.050 0.1 - 0.4 0.35 - 0.75 0.35 - 0.65 0.15 - 0.25